Working with a plan which has its assets invested through a brokerage firm. In the past when making distributions, checks were prepared from the plan account and then despoited with the fed tax deposit coupon at the employers bank. However, bank is no longer willing to take check drawn on another bank (brokerage account bank)for tax deposit.
How are other people handling this.

Also, have a plan which uses the employer TIN for the plan TIN. This requires that tax withholding be remitted electronically. How would this be handled using the same situation above.

To whom are checks being made payable? IRS?
If so, I have experienced that problem as well.

Have the checks for federal tax withholding made payable to the bank where you will be depositing the taxes with the 8109 coupon. Taxes will be remitted to IRS and credited to TIN same as before.

Not sure about electronic filing.

More detail--

Check are made payable to the bank but the bank doesn't want to take them as tax deposits since funds are "not collected" at that time and the bank would be fronting money for the tax deposit until the funds are "collected".

We are having same problem with tax deposits. The bank will not accept any checks which are not their checks for tax deposits.
We are curious as well how to handle this situation. Others have told us that they have the checks payable to the trustees, then have the trustees put the amount into an account and then cut another check for the same amount which is then deposited with the coupon at the bank where the account is. Anything simpler that anyone is doing?

Try using Search on something like Withholding deposits.

If anyone has come up with any simpler solution than those that have already been suggested, I'd be very interested.