Hi Ronald, since your trial expires on March 23, you cannot switch a free trial directly into a discounted promotional rate on the same account. Once the trial expires, you'll be charged the full standard price. To get the $4.60 rate, you have to be a new subscriber.
In your case, $4.60 is the 90% discounted monthly price for the Plus plan, while $46.00 is the standard monthly price. The $126 figure you're seeing is likely the annual total or a bundled price for several months at the standard rate.
Make sure to export your data and cancel the trial before it expires to avoid charges of $46 or $126. Use a new email to be recognized as a new subscriber and qualify for the promotion.
We'll provide ongoing assistance if you have any further concerns.