Tier 2 General - Extension - Pre-application Self-checks

Hi,

I am looking to apply for a Tier 2 extension in the next month or so. I am keen to perform some checks on myself in any of the relevant databases, to ensure that I have not left anything out in my declarations, before I submit my application. I have my concerns as I have missed a few council tax / bill payments and had my car towed before.

So far I have performed checks using the following:
(1) TrustOnline - UK Registry searches for any judgements: No records found using both current and previous addresses
(2) GOV.UK Driving Licence Check - Check for points and offences: No records found

Has anyone used TrustOnline and how reliable is the information? Are there additional checks I can perform for peace of mind? Is there a general checklist of searches / checks I should perform before I complete my submission?

Cheers,
CurioCat