Article Highlights:Tax Return Mistakes are CommonFixing Tax Return MistakesAmended ReturnSuperseding ReturnDon’t Procrastinate in Responding to IRSCommon Family Tax MistakesGenerally speaking, tax return mistakes are a lot more common than you probably realize. Taxes have grown complicated and the paperwork required to file proper tax returns is often convoluted. This is especially true if you're filing your taxes yourself.Congress has passed numerous tax laws in recent years making taxes ever more complicated. Even seasoned tax professionals have a hard time digesting all of the changes that they and their clients have to deal with, requiring hours of continuing education. All of this is to say that if you've just discovered that you've made a significant mistake on your tax return, the first thing you should do is stop and take a deep breath, and then call this office. It happens. It's understandable. There are steps that you can take to correct the situation quickly — you just have to keep a few key things in mind, including that the mistake could be in your favor.Fixing Tax Return Mistakes - Here's what you need to know:You generally have three years from the date that you originally filed your tax return (or two years from the date you paid the tax bill in question) to make any corrections necessary to fix your mistakes or oversights.There's a good chance that the IRS will catch an income omission, math errors, or an incorrect deduction or tax credit, in which case the IRS will probably send you a letter letting you know what happened and what you need to do to correct it.If fixing the mistake ultimately results in you owing more taxes, you should pay that difference as quickly as possible. Penalties and interest will keep accruing on that unpaid portion of your bill for as long as it takes for you to pay it, so it's in your best interest to take care of this as soon as you can.Many errors include not claiming tax benefits you are entitled to and cause you to pay more tax than required. You may have overstated or understated your income or received a late tax document, such as one if many varieties of 1099s or K-1s. To correct issues on an already filed return you generally need to file an amended return.An amended return is used to make corrections to previously filed returns. The possible corrections include, but are not limited to:Overstating or understating incomeChanging an incorrect filing statusAdding or deleting dependentsTaking care of discrepancies in terms of deductions or tax creditsIf any of the above apply to the error you've just discovered, you can — and absolutely should — file an amended return.If you catch the error prior to the filing due date of the return, instead of filing an amended return, you can file what’s called a “superseding return” to replace the original return. The difference is that when you file a superseding return you submit a complete new return to take the place of the one originally filed, while with an amended return, you fill out a special form (1040-X) and attach only back-up forms or schedules that pertain to the change.A sudden increase in your tax liability notwithstanding, it's again important to understand that errors on your income taxes aren't really worth stressing out about. The IRS understands that sometimes mistakes happen, and they have a variety of processes in place designed to help make things right.If you have received a notice from the IRS about an error on your tax return, don’t procrastinate in handling it – address the issue(s) raised by the IRS right away. The same applies if you have discovered an error. Either way, you can contact this office for assistance with responding to the IRS, preparing a superseding or an amended return, and requesting penalty abatement.Common Family Tax Mistakes – There are also common mistakes that occur when dealing with family members that you should avoid or correct if you have made them. The following are some commonly encountered situations and the tax ramifications associated with each.Renting to a Relative – When you rent a home to a relative for long-term use as a principal residence, the rental’s tax treatment depends upon whether the property is rented at fair rental value (the rental rate of comparable properties in the area) or at less than the fair rental value.Rented at Fair Rental Value– If you rented a home to a relative at a fair rental value, it is treated as an ordinary rental reported on your Form 1040 on Schedule E, and losses are allowed, subject to the normal passive loss limitations.Rented at Less Than Fair Rental Value– If you rented the home at less than the fair rental value, which often happens when the tenant is a relative of the homeowner, it is treated as being used personally by you; the expenses associated with the home are not deductible, and no depreciation is allowed. The result is that all the rental income is fully taxable and reported as “other income” on your 1040. If you are able to itemize your deductions, the property taxes on the home would be deductible, subject to the current $10,000 cap on state and local taxes. You might also be able to deduct the interest on the rental home by treating the home as your second home, up to the debt limits on a first and second home.Possible Gift Tax Issue – There also could be a gift tax issue, depending on if the difference between the fair rental value and the rent you actually charged the tenant-relative exceeds the annual gift tax exemption, which is $17,000 for 2023. If the home has more than one occupant, the amount of the difference would be prorated to each occupant, so unless there was a large difference ($17,000 per occupant, in 2023) between the fair rental value and actual rent, or other gifting was also involved, a gift tax return probably wouldn’t be needed in most cases.Below-Market Loans – It is not uncommon to encounter situations where there are loans between family members, with no interest being charged or the interest rate being below market rates.A below-market loan is generally a gift or demand loan where the interest rate is less than the applicable federal rate (AFR).The tax code defines the term “gift loan” as any below-market loan where the forgoing of interest is in the nature of a gift, while a “demand loan” is any loan that is payable in full at any time, at the lender’s demand. The AFR is established by the Treasury Department and posted monthly. As an example, the AFR rates for September 2023 were: