Number formatting options on Table visualizations

HI ssvr,

If you mean you are create report in live connection mode, current format tab not available on this mode.
I'd like to recommend you to write a measure to format your numeric value.

Reference:

FORMAT Function (DAX)

• Pre-Defined Numeric Formats for the FORMAT Function

• Custom Numeric Formats for the FORMAT Function

• Pre-defined Date and Time formats for the FORMAT Function

• Custom Date and Time formats for the FORMAT Function

Notice: format function will transform your value as text format which you can't direct use in calculation.

Regards,

Xiaoxin Sheng