Sorry to hear about your situation Cab2017,
I'm sure you don't need me to tell you that you need to seek professional financial advice,MABS etc,especially if you're considering entering bankruptcy,
With regards your taxi licence,as long as your tax affairs with Revenue are in order you shouldn't have any problems getting the required Tax Clearance Cert/Access Number to keep you self employed at least,but get the advice asap,
But do let us know how you get on and best of luck.