How to save and retrieve the values of textbox when model return list

I have a view which return a model in list .My view is as follows

    
        
            
                
                
            
        

        
            @foreach (handbook.Data.EmpDoc files in Model)
            {
                @if (files.Filevalues == "0")
                {
                    
                        
                        
                        
                    

                    
                }
                else 
                {
                    
                        
                        
                        
                    
                }


            }

        

    
File Name
Download


                          

                        
@files.Filename
@Html.ActionLink("Download", "DownloadFile", new { fileName = files.Filename, id = files.EmployeeId })


                            

                        
@files.Filename
@Html.ActionLink("Download", "DownloadFile", new { fileName = files.Filename, id = files.EmployeeId })

I this view i need to add a text box below the table and save and retrieve its comments

but since the controller return list and to retrieve the files i a using foreach loop the text box is repeating for 5 times instead of 1.

If i add the text box alone in a separate div the asp-for is not recognized since i cant passit in for each loop.

my controller is as follows

public async Task DocumentValidate(int? id)
{
    if (id == null || _context.EmpDocs == null)
    {
        return NotFound();
    }

    var getinfo = await _context.EmployeeBasicInformations.FindAsync(id);
    ViewBag.empid = getinfo.EmployeeId;
    
    var foldername = getinfo.EmployeeEmail;

    var docinfo = await _context.EmpDocs.FindAsync(id);
    ViewBag.remarks = docinfo.HrRemarks;

    EmpDoc lol = new EmpDoc();

    
    string dirPath = Configuration["FolderPath:Document_Path"];

    string path = Path.Combine(dirPath, foldername);

    string[] folderpath = Directory.GetFiles(path);

    EmpDoc docsss = new EmpDoc();

    List files = new List();

    foreach (string folderpaths in folderpath)
    {
        
            files.Add(new EmpDoc
            {
                Filename = Path.GetFileName(folderpaths),
                EmployeeId = getinfo.EmployeeId,
                Filevalues = Path.GetFileNameWithoutExtension(folderpaths)
            });
                    }

    return View(files);
}

any model is as follows

public partial class EmpDoc
{
    [Key]
    public int EmployeeId { get; set; }
    
    public string? HrRemarks { get; set; }
    [NotMapped]
    public IFormFile File { get; set; }

    [NotMapped]
    public string Filename { get; set; }

    [NotMapped]
    public string Filevalues { get; set; }
}

How to save and retrieve it. Please advice