The program asked for date acquired for permanent portfolio mutual fund shares. They were acquired monthly over several years. What do I put?

[ColeenD3]

Please see this answer from HalAl:

Unknown cost basis

You have to report the sale on your tax return. Lacking any cost basis, the IRS will consider the entire sale amount as taxable. So, you need to make your best effort to determine the original cost basis, even if (worst case) it's a guess. Historical prices of publicly traded stocks and mutual funds are  readily available on the internet and should, at least, satisfy the IRS that your basis wasn't zero; just "google" “Historical mutual fund Prices". The mutual fund company should  be able to help.