Back-door Roth Conversion - 1 cent left in Traditional IRA

Hi there,

 

1. On 12/26, I funded my Traditional IRA .

2. Also on 12/26, I request to fully convert it to my Roth IRA.

3. The conversion was done on 12/29 (only 1 business day).

4. Today (12/30), I found 1 cent in the Traditional IRA.

 

I have submitted another request to convert the 1 cent to the Roth again.  Hopefully they can have it done tomorrow.

 

If not, do I still need to do the pro-rata tax calculation or 1 cent would just be omitted by both my broker and IRS?

 

Thank you very much for taking a look at my stupid question!