Steps to implementation of Multi-Currency in Tally.ERP 9

Go to Gateway of Tally.ERP9,  Select F11: Accounting Features , Set Allow Multi-Currency to Yes 

Accept to Save.Once the Multi-Currency feature is enabled in F11: Accounting Features, you can view the Currencies menu from Gateway of Tally > Accounts Info > Currencies

To create a foreign currency
Go to Gateway of Tally > Accounts Info. > Currencies > Create
Enter the currency symbol in Symbol field. This symbol appears in your reports, wherever applicable.
Use ASCII Special Characters with [Alt] key combination, if your keyboard does not have the symbol. Utilities like Character Map (Start > All Programs > Accessories > System Tools) in Windows, shows the key combination for most symbols. This might be different on some notebook computers, refer to the computer’s user manual or the vendor.
You cannot assign a duplicate currency symbol for a company in Tally.ERP 9.
The Key combinations for a few currency symbols are given below:
Alt + 156 –Pound Sterling – £
Alt + 0165 – Japanese Yen – ¥
Alt + 0128 – Euro – €
Use the Dollar and the Rs. Symbol from the keyboard

Enter the name of the currency in Formal Name. e.g., US Dollars, Pound Sterling, Indian Rupees, Omani Rial and so on.
Note: You cannot assign a duplicate Formal Name for a currency in Tally.ERP 9.
Enter the number of decimal places for the currency in Number of Decimal Places. E.g. Currencies with 2 decimal places like paisa and currencies with three decimal places like dinar. There are currencies that do not have decimal places, e.g., Vietnamese Dong.
Tally.ERP 9 has two formats for displaying an amount, viz., in millions and in lakhs. 1000000 (one followed by six zeroes) in millions format would appear as 1,000,000 and lakhs would appear as 10,00,000.
Select the required parameter in Show Amounts in Millions field. If you select No, the amounts will appear in Lakhs, by default.
Note: You can always specify the appearance of numbers in specific reports, e.g. In Profit & Loss Account display, press F12: Configure to change scale factors for values.
Set Is Symbol SUFFIXED to Amounts to Yes for the symbol to appear after the amount. Set it to No, for the symbol to be prefixed to the amount.
Set Put a SPACE between Amounts and symbol? to Yes to apply a space between amounts and symbol.
8. Enter the Symbol for Decimal portion of currency in Symbol for Decimal Portion of Amount field. Eg., Ps. for Paise.
9. Enter the number of decimal places for printing the amounts in words in Decimal Places for Printing Amounts in Words field. This number should be equal to or lesser than the number specified in Number of Decimal Places field.