Retirement tax questions

" I was surprised that I was not required to complete any other proof other than say I rolled the total amount over in to the same time of IRA. "

 

That is because the IRS gets a copy of the form 5498 (that you also get) that shows the rollover ... that is the confirmation of what you entered on the tax return.  It is just that simple ... nothing more needed to be done on your return.   Keeping the records of all things that happen inside your IRA until it is completely liquidated is wise.