Unsolicited advice, so take it for what it’s worth;
When filling out your SF, pull your credit report (not your FICO score, your actual report) from all three bureaus. All three will be pulled within days of submitting your paperwork, so get current ones from The Big Three. Go through your reports and be certain to list each and every derogatory incident (late payments, items that went to collections, charge offs, etc). As noted before, read each question carefully. Some have a time frame, some are “ever” questions.
Be prepared to fully discuss any and all financial issues, even if they were not required to be listed, as they may still pop up. Trust me, no Investigator who has worked more than a week in the field is going to judge you. They are going to dig for all information…who, what, why, when, etc.
I think of it as a time line. Start with what happened, and go through the steps (on each account) until present day, including what you have done to resolve the debt, and what steps you have taken to lessen the chance of it happening in the future.
Lastly, who is aware of the debt (your spouse, your friends, etc) and can it be used against you as blackmail.
Financial issues are the number 1 reason clearances are denied. That doesn’t mean you don’t stand a chance, it means that you need to lay out fact as to what happened and how you are mitigating the issue.
Best of luck to you, been there, done that. It’s tough but not impossible.