Form 8829

[hmness5]

The assessment on my house changed. How do I update this form? When I override the amount, it comes up as an error in the final check process

[AmeliesUncle]

An assessment on your house would not "change" anything on Form 8829.

[hmness5]

The form uses the value of your house in the calculation

[RachelW33 · Accepted solution]

Once you set the value for your home when you start using it for business, you do not make adjustments.

Please see the instructions for Form 8829:

Lines 37 Through 40

Enter on line 37 the cost or other basis of your home (including land), or, if less, the fair market value of your home on the date you first used the home for business. Do not adjust this amount for depreciation claimed or changes in fair market value after the year you first used your home for business.

[AmeliesUncle]

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@hmness5 wrote:

The form uses the value of your house in the calculation

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It uses the lower of (a) Cost or (b) Fair Market Value on the date it was FIRST converted to business.  Any value changes after that date do not affect it.

[EDIT: Sorry, I didn't see Rachel's comment right above mine, so my post basically says the same thing.]