What should I check on my HAP Request before I save it to make sure it is correct?

On the HUD-52670 A Part 1 (detail page) There should be an expectation that the amount of regular assistance being requested should only change from one month to the next when a tenant certification is being included as part of the new HAP request.

In the Build New HAP Request wizard, the Certification tab identifies all of the tenant certifications that will be included as part of the HAP request.  MAT records for each tenant certification will be included in the electronic file sent to TRACS.  Certifications not included are indicated with a purple box to indicate they have not been signed.  A blue box indicates the certification is incomplete.  A checked box under Voucher File indicates the certification will be included.  Show Me
Are the certifications you expect to include signed and ready to send?
  If not, return to the Household tab and complete the certification.

Once you are on the 52670 Summary and Detail tabs:

Walk me through it

What do I do if the subsidy amount is blank or incorrect for a unit that should receive subsidy?