Your IVA will remain on your file for six years from the date of original acceptance so you will need to let that drop off.
Get your record from all three credit agencies - Call Credit, Experian and Equifax and see if there are any defaults registered after the start date of the IVA. If there are then you need to write to the data controllers at the creditors involved enclosing a copy of your completion letter and tell them to remove the defaults.
Make sure your bank account is up to date and any mortgage payments (if applicable) and if you have a mobile phone contract then that will help.
Follow through Make your dreams come true Don't give up the fight You will be alright 'Cause there's no one like you in the universe