@Critter-3 The IRS link that you posted is for employers to pay the deferred Social Security payroll tax that is owed by employees. The OP is asking how a self-employed person can pay deferred self-employment tax. But you prompted me to search the IRS web site. I found the following, which answers the OP's question and seems to be the source of the Tax Associates, Inc. post. This was just posted by the IRS a few days ago.
How self-employed individuals and household employers repay deferred Social Security tax
