If I was only covered by a HDHP for half a month, do I mark that I was covered for that month or not on form 8889-T? I have HSA funds from my brief 2 month employment.

I worked a new job last year for only two months and was very briefly enrolled in their HDHP. Eligibility for enrollment in the company's HDHP was available to me the first of the month after my first 30 days. I started in August, and therefore I became eligible in October. The plan also enrolled me in an HSA, of which $179 was contributed by my employer (I contributed nothing). I ended up leaving this job midway through October and never used any of the company's benefits, as I had kept my own marketplace insurance knowing I would likely be leaving this job soon. I am being asked to fill out a form 8889-T on TurboTax and it's asking me to select my HDHP coverage by the month, insisting I must have had coverage since I have HSA funds. Should I put that I was not covered any month by this plan or should I mark that I was covered in October, despite resigning halfway through the month?