Get your taxes done using TurboTax

You will need to continue with TurboTax Desktop in order to claim any deductions, such as a Home Office Deduction.

You will not file Form 1045 as that would be for a Net Operating Loss Carryback.

The TurboTax program will carry the loss forward, and it can also be entered into the program manually.

A return cannot be e-filed with Form 1045, but again, you won't be needing it. 

In TurboTax, since you made the Mark to Market election, first establish your Schedule C if needed, and enter your expenses, including Home Office if applicable.

The Home Office Deduction will at first be disallowed. 

Enter the details of the trades with adjustments.

1. Open or continue your return in TurboTax.
2. Under the Business tab section scroll down to “Less Common Business Situations” and select Start or Update next to “Sale of Business Property”.
3. On the “Any Other Property Sales?” screen, select Sales of business or rental property that you haven’t already reported and select Continue.
4. On the “Sales of Business or Rental Property” screen, select Yes or No to question “Do all of the following apply to the property you sold?”

On the page “Tell Us About Your Sale”, select the Type of sale. (To report on Form 4797 in Section II, select Held one year or less.) Then select Continue.

Once the trades are entered, switch to FORMS MODE

Form 4797 Line 18b is the gain, use this amount and enter it on Form 8829 Part II Line 8 Calculation Worksheet line 2C.

This will allow the Home Office Deduction to be recognized. 

You may also check to see if the NOL was carried over in Forms Mode or under

Business Income and Expenses

Less Common Business Situations

Net Operating Loss/QBI Carryforward Loss

There does not seem to be a discount available for the Desktop software through this program.