add tax field in invoice total

kindly help me to showing these fields in simple printed invoice total
see file plzzzz

 

kindly provide help

 

[Part:expsmp invTotal]
Line:SJ00,Sjj00

[line:SJ00]
left Field:Name Field:sjj0001
Right Field:Name Field:sjj0002

[Field:sjj0001]
Use:Name Field
Set as:ADD surcharge
Align:center

Style:Normal Bold


[Field:sjj0002]
Use:Name Field
Set as: this should be 10% of Inv Amount
Align:center
Style:Normal Bold



[line:SJJ00]
left Field:Name Field:sjj00010
Right Field:Name Field:sjj00020

[Field:sjj00010]
Use:Name Field
Set as:Net Invoice
Align:center
Style:Normal Bold


[Field:sjj00020]
Use:Name Field
Set as: this should be 10% of Inv Amount+inv Amount=net inv amount
Align:center
Style:Normal Bold

 

kinldy see how i can make correction please

 

PLEASE GUIDE ME

 

GOOD EVENING
I PREPARE A CODE WITH THE HELP OF A MEMBER FREELANCEE
KINDLY GUIDE ME HOW CAN I SET FORMULAE IN RED MARK SENTENCE





[#Form : Simple Printed Invoice]

Add : Bottom Part : After : EXPSMP totals : EXPSMPTotalAmout
Local : Part :EXPSMP totals: Invisible : no

[Part : EXPSMPTotalAmout]

Line : EXPSMPTotalArrears,EXPSMPTotalAmout, EXPSMPTotalTaxAmout, EXPSMPTotalInvAmout
Border : Thin Top

[Line : EXPSMPTotalArrears]

Right Field : Medium Prompt, Name Field
Local : Field : Medium PrompT : Info : "Arrears"
Local : Field : Name Field : Set as : HOW TO SET AS ?????
local:Field:Medium Prompt:Format : "DrCr"
Local : Field : Name Field : Align : Right
Local : Field : Medium Prompt : Border : Thin Left
Local : Field : Name Field : Border : Thin Right
[Line : EXPSMPTotalAmout]

Right Field : Medium Prompt, Name Field
Local : Field : Medium PrompT : Info : "Pay within Due Date"
Local : Field : Name Field : Set as : $$AsDrAmt:#EXPSMPPrevBal + #EXPSMPBillAmt THIS IS NOT WORKING
local:Field:Medium Prompt:Format : "DrCr"

Local : Field : Name Field : Align : Right
Local : Field : Medium Prompt : Border : Thin Left
Local : Field : Name Field : Border : Thin Right

[Line : EXPSMPTotalTaxAmout]

Right Field : Medium Prompt, Name Field
Local : Field : Medium PrompT : Info : "Lp Surcharge"
Local : Field : Name Field : Set as : $$AsDrAmt:#EXPSMPBillAmt*7% THIS IS ALSO NOT WORKING
Local : Field : Name Field : Align : Right
Local : Field : Name Field : Print fg:Blue
Local : Field : Medium Prompt : Border : Thin Left
Local : Field : Name Field : Border : Thin Right

[Line : EXPSMPTotalInvAmout]

Right Field : Medium Prompt, Name Field
Local : Field : Medium PrompT : Info : "Payable After Due Date"
Local : Field : Name Field : Set as : $$AsDrAmt:#EXPSMPPrevBal + #EXPSMPBillAmt + #EXPSMPBillAmt*7% THIS IS ALSO NOT WORKING
local:Field:Medium Prompt:Format : "DrCr"
Local : Field : Name Field : Align : Right
Local : Field : Medium Prompt : Border : Thin Bottom Left
Local : Field : Name Field : Border : Thin Bottom Right

[System : Formulae]

IsAMT : $Parent:Ledger:$LedgerName = $$GroupSales Or $Parent:Ledger:$LedgerName = $$GroupIndirectIncomes
IsTaxAMT : $Parent:Ledger:$LedgerName = $$GroupDuties

 

kindlly see
values are not fetching automatically