Hello, Jack! To me, n°1 belongs to the past; you're talking about a time when you used to work in a firm, and at that time you never forgot to punch in your hours. N°2 should be "I have never forgot ten "; you're still working in the firm.
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etc.
I have forgot much, Cynara! gone with the wind,
Flung roses, roses, riotously with the throng,
Dancing, to put thy pale lost lilies out of mind...
"I have forgot" has a slightly poetic airCautious addendum: or "regional".