I am over 59.5 and I want to use my solo 401k to shift income from a high-tax (high-income) year to a low-tax year. I wonder if there are any limits on the timing of contributions and distributions that would prevent this. Specifically, I want to contribute in Q1 2025 for the 2024 tax year, but I also want that money back in order to pay my taxes in April 2025. Effectively I would be using my 401k withdrawal in Q1 2025 to fund my 2024 contribution, thus shifting income from 2024 to 2025 for tax purposes. I have ample income in 2024 to justify the contribution (just no money left at the moment). Any reason this would not be allowed by the IRS?