Is your form bound to a table? If yes then place a button on the form
with the following code (button options > events > on click)
DoCmd.GoToRecord , , acNewRec
If your form is bound, then after entering the new record all you need
to do is close the form and your data will be saved into the table the
form is bound to, or you can also place a button on the form with the
following code to save the record.
DoCmd.RunCommand (acCmdSaveRecord)
Use the access wizard to create custom buttons and other controls
automatically, just grab the button and place it on the form in the
design view, if it does not work then you need to turn on the wizard by
select the "Control Wizard" option on the tool box menu bar (The little
magic wand)
GAVO