As NCperson said, code 7 is incorrect for a distribution from a Roth IRA. At age 63 the code would be T if at the time of the distribution it had been less than 5 years since the beginning of the year that the Roth IRA was first funded, otherwise code Q. (Code B is for a distribution from a designated Roth account in an employer plan, not for a distribution from a Roth IRA.)
If it's been less than 5 years since beginning of the year for which you first made a Roth IRA contribution, the taxable amount must be determined on Part III of Form 8606 by applying your basis in Roth IRA contributions and conversions to determine the taxable earnings, otherwise the distribution is entirely nontaxable and the distribution does not get reported on Form 8606 Part III.
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