So you’re in your lowest earning years right now assuming you’re a first year Army doc? For 2023, I would do $22,500 in Roth TSP and $6,500 in Roth IRA. You can probably try to do this throughout your obligated service. Once you leave the military and become a civilian physician, you’d probably switch to Traditional 401k contributions to keep your taxes low and then use the Backdoor Roth IRA process.