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Re:Equifax takes down web page after reports of new hack by kevin_thibedeau on Friday October 13, 2017 @12:30AM (#15463287)
USPS address forwarding is only good for six months.
Re:Equifax takes down web page after reports of new hack by bogomipz on Friday October 13, 2017 @01:49AM (#15463520)
The point is not how long mail forwarding is good for but rather the USPS already has up to date mailing address information for US citizens.

If the IRS is using Equifax for proper address verification as the OP states, then that information is already available via the USPS which is a government agency with real oversight.