We have a home office in our primary residence, and TT Home & Business 2018 Tax Guidance pop-up window says:
"Why Do I Have to Depreciate My Home Office?
In the IRS' eyes, you depreciate your home office whether you claim depreciation on your tax return or not. So you might as well depreciate it and receive the tax benefit of doing so."
And it is asking for purchase price & date, etc. in order to calculate that.
