Yes, you can include
the expenses on Schedule C for your husband’s self-employed writing business. Home office expenses for the writing business
will also be included as part of Schedule C.
Then, use the same Schedule C for the 2017 tax return to claim the 2017
income and expenses.
Use the following steps to go to that section of your
return:
On the top row of the
TurboTax online screen, click on Search (or for CD/downloaded TurboTax
locate the search box in the upper right corner)
This opens a box where you
can type in “schedule c” (be sure to enter exactly as shown here) and
click the magnifying glass (or for CD/downloaded TurboTax, click Find)
The search results will
give you an option to “Jump to schedule c”
Click on the blue “Jump
to schedule c” link