Depreciation Method Error - SL vs 200DB in 2017 Sch. E.

[Frank S.]

Hi there, 

While finalizing my 2018 taxes, I found an error on my 2017 Schedule E, Depreciation calcs.

In 2016, my accountant used the straight line depreciation method for "Appliances".  The following year, I used the double-declining-balance depreciation in 2017 for the same item . This was a default selection for the tax software and I didn't catch that before sending my taxes.

2016 - Original Depreciation Used
Appliances
Date Acquired: 06/29/2016
Method: SL Life:7 years
Conv:HY
Unadjusted Basis $950
Reduction in Basis: $475
Current Deduction: 509
Ending Accumulated Deduction: 34

2017

Appliances 

Method: 200DB

This means a $126 total difference on my 2017 tax return under Schedule E, 18. Depreciation expense of depletion. It does not affect the amounts owed to the Feds or the State.

How do I fix this error? Is it simply an amendment to my 2017 taxes or should I get an accountant to deal with it?  if  so, PM me with your contact.   I got all the data ready.    Curiously, it seems that Turbo Tax software always defaults to 200DB rather than SL.

RE:
Changing Your Depreciation Method
If you make a mistake and claim the wrong depreciation amount, you generally can file an amended tax return (Form XX) for the year at issue and correct your deduction. However, if you make the same mistake for two or more consecutive tax years and the mistake is not a simple math error (for example, you realize that you've been using the wrong table), you've effectively chosen an accounting method, and you cannot correct the mistake by filing an amended return. Instead, you must file IRS Form 3115, Application for Change in Accounting Method, requesting permission to change accounting methods.

Any help is appreciated,

Frank