I looked it up on the IRS and they said you need to put in the proportion of your income from March27-December31 to estimate eligibility for deferral (but does not require you to defer). It's on the same form as the one required for self employment taxes, so you can't get rid of it entirely. After I deleted the forms, I went back, filled in the number in that line based on the approximate proportion suggested by the IRS, and it went through.
