Yes, you can take more than the required minimum amount out of your IRA or retirement plan. Your total distribution amount for the year will be reported on Form 1099-R, Distributions from Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, etc., and appropriate tax consequences will apply.
Amounts taken in excess of your RMD for the year are not applied toward any future years’ RMDs.
Note: For 403(b) plans, any amount in excess of the RMD would be considered a distribution eligible to be rolled over. These distributions are subject to plan sponsor approval and a 20% minimum federal tax withholding.