Tax rule as per logged in user

I have cart & i was wondering how can we add tax rule from users table. Like every customer has different tax rate. I added a new column on User table as TaxRate
Example: User ABC has 5.5% or XYZ has 5%

Also 0.3% Charges , discount of 5% needs to be added on ecart. what options would be perfect for these?
How can it be done?

I got latest version of eCart.

You would want to save the information from the users table into the Session when they log in. Then you can use the session variable to add discounts, charges, and taxes by editing the cart object and using the appropriate tab to add a rule based on the stores session variables.

i added session new session as UserTax but how does formula work?
Example:
I m looking at something lik this:

PRODUCT | RATE | SUBTOTAL
XYZ | 100 | 100
ABC | 100 | 100

SUBTOTAL: 200**

Discount 5% on subtotal (static value) : -10 *

Sales Tax $_SESSION['UserTax'] (ex: 5) so 5% on subtotal after discount ie 190 (200**-10*) : 9.5
Insurance 0.3% on Subtotal (200): 0.6

TOTAL: 200.1 (200-10+9.5+0.6)

Add the discounts and charges by editing the cart. Do one at a time. Start with the discount. Then add the insurance. Then add the tax.

If you want help then we could do this for you in a premium support ticket.

In cart i want to use 5% off, all the time. This is default. Screenshot attached.


this is displaying : Parse error: syntax error, unexpected ')' in /***/**/WA_eCart/eCart1_PHP.php on line 90

Ah thanks anyways. i got it fixed.