A 7 in box 7 means that it's a normal distribution made to someone age 59½ or older.
If the IRA/SEP/SIMPLE box is also marked (as is suggested by box 2a equaling box 1 and box 2b Taxable amount not determined being marked), this is a Form 1099-R for a distribution from a traditional IRA. Your distributions from a traditional IRA are generally fully taxable unless you have made nondeductible contributions to your traditional IRAs, reported on a Form 8606 or some portion of the distribution is excludible from income as a result of you being over age 70½ and having made a Qualified Charitable Distribution, or if you made a one-time HSA Funding Distribution to fund an HSA contribution.
