KRA had sent out texts on Tuesday to account owners who had not migrated to get in touch with its agents in order to regularize their status on the platform.
Legal experts on tax issues have termed the deactivation of non compliant accounts move as illegal.
The authority has however said that they have been receiving a lot of pressure from treasury to collect more revenue.
The notice also stated that tax payers who had not filed their taxes in three months would also be rendered inactive as they will be assumed to not be trading.
This move is aimed at reducing tax evasion from traders who are already migrated to iTAx from filing Nil returns or not even filing returns while still trading.
The deadline for the migration was on the 31st of August 2017.
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