Hi, Legendary.
In QuickBooks Self-Employed, 401(k) contributions made directly from your business income cannot be categorized as a deductible business expense. The IRS treats 401(k) contributions as a personal deduction rather than a business expense since they're part of retirement savings.
Since you’ve already maxed out your 401(k) contributions and are managing estimated taxes, I recommend consulting a tax professional. They can ensure you’re taking full advantage of other retirement savings options or deductions that may apply to your situation.
Let us know if you have further questions or need guidance on other aspects of QBSE.