I forgot to create the EFT file and submit it to the bank!

No problem. Create the EFT file during your next EOD process. Theatre Manager will automatically include all the EFT payments that have not been previously submitted for transfer, allowing you to submit the file for processing.

Keep in mind that there are limitations to past and future-dated transfers. If the EFT payment falls out of the date ranges, it will be rejected by the bank. Your bank will notify you of such rejections.