NACHA File Formatting

I need an ACH NACHA file formatted from a set of transaction data.

Requirements:
- Format transaction data from Excel to NACHA
- Include the following fields:
- Account number
- Transaction amount
- Transaction date

Ideal Skills and Experience:
- Extensive Familiarity with NACHA file format
- Proficiency in Excel
- Attention to detail to ensure accuracy

MUST have done this before for a US Retail bank.